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lorsque le carbone tertiaire ne porte que des méthyles, le radical tertioalcoyle est un tertiobutyle.
if the tertiary carbon carries only methyls, the tertiary-alkyl radical is tertiary-butyl.
Last Update: 2014-12-03
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sous l'expression tertioalcoyle, on désigne un radical hydrocarboné saturé présentant un carbone tertiaire portant indépendament des radicaux éthyles ou méthyles.
more particularly, it relates to the preparation of a ditertiary-butyl dicarbonate from an acid halide. background of the invention the expression tertiary-alkyl designates a saturated hydrocarbon radical having a tertiary carbon which carries ethyl or methyl radicals independently of one another.
Last Update: 2014-12-03
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la présente invention concerne un procédé de préparation du dicarbonate de ditertiobutyle par mise en contact d'un pyrocarbonate de tertioalcoyle avec un halogénure d'acide en présence d'un agent complexant.
process for the preparation of di-tert-butyl dicarbonate by bringing a tert-alkyl pyrocarbonate into contact with an acid halide in the presence of a complexing agent.
Last Update: 2014-12-03
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dans la suite de la description, on ne citera que le radical tertiobutyle qui servira de paradigme des tertioalcoyles visés par la description. il est connu depuis longtemps de préparer le dicarbonate de ditertiobutyle encore souvent dénommé boc₂o à partir du pyrocarbonate de tertiobutyle et de phosgène tel que par exemple décrit par j.h. howe dans le journal or organic chemistry 27, 1901 (1962).
in the description which follows, only the tertiary-butyl radical will be discussed as an example of the tertiary-alkyls envisaged by the description; however, the use of one example as a means to describe the process is not intended to limit the scope of protection to only one species. it is well known in the art to prepare ditertiary-butyl dicarbonate, (boc).sub.2 o, from tertiary-butyl carbonate and phosgene, such as described by j. h. howe in the journal of organic chemistry 27, 1901 (1962).
Last Update: 2014-12-03
Usage Frequency: 1
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